From 62178bd7c6f062fe5da2fbf7f0ad88f7ac3b9040 Mon Sep 17 00:00:00 2001
From: iosabi <iosabi@protonmail.com>
Date: Sun, 30 Mar 2025 12:04:04 +0200
Subject: [PATCH] Fix handling of timezones in the date picker

The API returns UTC datetimes, like "2025-03-29T18:22:10.681Z" but we
want the user to pick times in their local timezone like in the web UI.
`DateTime.now()` already returns a local time, so all we have to do is
convert the UTC time to local when displaying in the widget and back to
UTC afterwards.
---
 lib/widgets/list_list.dart | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/widgets/list_list.dart b/lib/widgets/list_list.dart
index eb77ba5..f12018f 100644
--- a/lib/widgets/list_list.dart
+++ b/lib/widgets/list_list.dart
@@ -665,7 +665,7 @@ class _ListListState extends State<ListList> {
   }
 
   Widget buildDueDateWidgetPreview(String newDueDate, String cardId){
-    DateTime dueDate = DateTime.parse(newDueDate);
+    DateTime dueDate = DateTime.parse(newDueDate).toLocal();
     DateTime now = DateTime.now();
     bool isOverdue = dueDate.isBefore(now);
 
@@ -681,7 +681,7 @@ class _ListListState extends State<ListList> {
 
 
     // Check if the due date result is already in the cache
-    if (dueDateCache.containsKey(dueDate)) {
+    if (dueDateCache.containsKey(dueDate.toString())) {
       // Cache the calculated due date result
       dueDateCache[dueDate.toString()] = result;
     }
@@ -695,7 +695,7 @@ class _ListListState extends State<ListList> {
 
         ///Update Card Due Date
         if(dateTime != null) {
-          await Provider.of<CardProvider>(context, listen: false).updateCardDueDate(cardId: cardId, newDueDate: dateTime.toString()).then((_) {
+          await Provider.of<CardProvider>(context, listen: false).updateCardDueDate(cardId: cardId, newDueDate: dateTime.toUtc().toString()).then((_) {
             // Call the onRefresh callback if it exists
             if (widget.onRefresh != null) {
               widget.onRefresh!();